ML19320A052

Nonroutine Nonradiological Environ RO 50-313/74-05:on 741204,fish Impingement on Intake Screens During 8-h Period Totaled 6,134 Lbs.Caused by Lake Water Temp Decrease in Winter

ML19320A052
Person / Time
Site:	Arkansas Nuclear
Issue date:	12/11/1974
From:	Reuter D ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19320A044	List: ML19320A043 ML19320A052
References
NUDOCS 8004140669
Download: ML19320A052 (3)

Text

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. 50-313/74-5

1. Non-Routine, Non-Radiological Environmental Report No.

3. Occurrence Date: 12/4/74

2. Report Date: 12/11/74 k 4. Facility: Arkansas Nuclear One-Unit 1 Russellville, Arkansas i

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Identification of Occurrence _: Fish kill on intake screens exceedi.ng 3000 sample period.

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6. Conditions Prior to Oecurrence: ~ -

1855 _ NWth I

X Reactor Power Steady-S,t ate Power Net. Output 656 __MWe i lloc Standby _

75 %

Percent of Full Power Cold Shutdown

' Refueling Shutdown -

,O I Routine Startup _

operation .

Routine Shutdown Operation . .. -

Load Changes During Routine Power Operation l Four circulating water pumps were in operation.

Other (Specify)

7. Description of Occurrence _:

During routine fish impingement monitoring.12/4/ The projected of fish were collected during an 8-hour sample period. 12/4/74 and fish kill for the 24-hour period beginning at 8:00 c.m.

I j ending sample.

at 8:00 a.m.12/5/74 was 18,402 pounds based Other fish made up .3% of the total weight. -

total weight of fish.

Threadfin -shad made up 97% of the total number of shad. .

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Non-Routine, Non-Radiological Environmental Report No. 50-313/74-5

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8. Designation of Apparent Cause of Occurrence:

Design Procedure .

s] - Manufacture Unusual Service Condition Including L Installation / Environmental Construction Component Failure Operator Other (Specify) The apparent cause was due to a decrease of lake water temperature caused by cold weather.

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9. Analysis of Occurrence:

1 The only noticeable Environmental Impact was the removal of the ab61 mentioned fish from the lake. The fish that were collected were dis posed of through landfill operation. The fish that were not collect were disposed of through the trash disposal system.

10. Corrective Action:

I Long term studies are in progress to determine the effects of plant olieration on the aquatic ecosystems of the Dardanelle Reservoir. D:

from this report and other data obtained is fed back into these studies to determine what changes might be made to the studies in order to ensure that adequate data is obtained for evaluating plant [

impact. Review by APSL and its consultants of the results of these' I studies will determine what corrective action might be taken to redi plant effects on the Reservoir.

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July 5, 1974 NSP-It, Rev. O Page 2 o~f l

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I Non-Routine, Non-Radiological Environmental Report No. 50-313/74-5 I g 11. Failure Data:

l The circumstances of this report are similar to those reported in i

], Non-Routine, Non-Radiological Environmental Reports 50-313/74-1, f 50-313/74-2, 50-313/74-3, and 50-313/74-4. ,

i 12.- Reviews and Approvals: s Reviewed and Approved by: Plant Safety Committee Yes (X) No ( ) -

p Plant Superintendent Yes (X) No ( )

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Reference:

JNA-715 Date: 12/9/74 Reviewed by:

Date: # //

Licensing Supervisor Approved by:f';@ && // t k.( Date: /',T .,- G .,i o '

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5fety jR'evie " Committee J Approved by: 1 ' .h Ed 1 ta ~g ' '

Ma ager of h cicar Ser i Date: //[e' '

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Approved by: tjYAE 't,

'-/.,b? .> f Date:s'? /} l J

,- Director of Power Production Approved by: - [ / t. ( ',. . Date: -

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Senior Vice President

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c w Ju Juu .. 93 July 5, 1974 NSP-10, Rev. O Page 3 of 3 1